Supersprint
100CPSI HJS Motorsport Catalytic Converter Kit
SKU: 044021
Moderate — 2–4 hours
Description
This downpipe kit replaces restrictive factory US M3 catalytic converters with high-flowing units, offering substantial performance gains across the entire RPM range. It requires welding for installation and features O2 bungs and EGT threaded provisions for perfect fitment with Supersprint front exhaust sections or stock exhaust systems.
Fitment
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Available on iOS & Android
Specifications
| Brand | Supersprint |
| Part Number | 044021 |
| Category | Exhaust |
Buy with Confidence
Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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